Geoscience professor Michael Mann and atmospheric science professor Katharine Hayhoe speak at the Commonwealth Club of California about how and why the study of climate science has become so politicized.

Hambler cites some distressing statistics from sources around the world. Between 6-18 million birds and bats are killed by Spanish wind farms each year Hambler says, including 400 griffon vultures per year just at Navarro. German wind turbines kill at least 200,000 bats per year, depressing populations up to 2,000 miles away. Wind turbines in the U.S. have been estimated to kill 70 bats per installed megawatt per year, on average, says Hambler. That would work out to about 320,000 bats per year in California.